/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Microsoft Corporation
 * 
 * -=- Robust Distributed System Nucleus (rDSN) -=- 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*
 * Description:
 *     What is this file about?
 *
 * Revision history:
 *     xxxx-xx-xx, author, first version
 *     xxxx-xx-xx, author, fix bug about xxx
 */

#pragma once

# include <dsn/tool_api.h>
# include <boost/asio.hpp>

namespace dsn {
    namespace tools {
        
        class asio_network_provider : public connection_oriented_network
        {
        public:
            asio_network_provider(rpc_engine* srv, network* inner_provider);

            virtual error_code start(rpc_channel channel, int port, bool client_only, io_modifer& ctx) override;
            virtual ::dsn::rpc_address address() override
            { return _address;  }
            virtual rpc_session_ptr create_client_session(::dsn::rpc_address server_addr) override;

        private:
            void do_accept();

        private:
            friend class asio_rpc_session;

            std::shared_ptr<boost::asio::ip::tcp::acceptor> _acceptor;            
            boost::asio::io_service                         _io_service;
            std::vector<std::shared_ptr<std::thread>>       _workers;
            ::dsn::rpc_address                              _address;
        };

        class asio_udp_provider : public network
        {
        public:
            asio_udp_provider(rpc_engine* srv, network* inner_provider);

            virtual ~asio_udp_provider();

            void send_message(message_ex* request) override;

            virtual error_code start(rpc_channel channel, int port, bool client_only, io_modifer& ctx) override;

            virtual ::dsn::rpc_address address() override
            {
                return _address;
            }

            virtual void inject_drop_message(message_ex* msg, bool is_send) override
            {
                // nothing to do for UDP
            }

        private:
            void do_receive();

            // create parser on demand
            message_parser* get_message_parser(network_header_format hdr_format);

            bool                                            _is_client;
            boost::asio::io_service                         _io_service;
            std::shared_ptr<boost::asio::ip::udp::socket>   _socket;
            std::vector<std::shared_ptr<std::thread>>       _workers;
            ::dsn::rpc_address                              _address;
            message_reader                                  _recv_reader;

            ::dsn::utils::ex_lock_nr                        _lock; // [
            message_parser**                                _parsers;
            // ]

            static const size_t max_udp_packet_size = 1000;
        };

    }
}
